Grate bar



A. J. NAQUIN GRATE BAR Sept. 18, 1923.

Filed Oct. 18 1921 Patented Sept. 18, 1923.

UNITED, STATES ARTHUR JOSEPH NAQUIN, OF ALEXANDRIA, LOUISIANA.

snarl: BAR.

Application filed October 18, 1921. Serial No. 508,525.

To [ZZZ whom z'tmay concern: 7 V

Be it. known that I, ARTHUR J. NAQUIN, a citizen of the United States,residing at Alexandria, in the parish of Rapides and State of Louisiana,have invented certain new and useful Improvements in Grate Bars, ofwhich the following is a specification. 7

This invention relates to improvements in grate bars and moreparticularly to that type in which the body of the bar is formed with anumber of draft perforations arranged in longitudinally extending rows.The formation of these perforations tends of course to weaken the bodyof the bar, and to counteract this weakening effect, bars of this typeare ordinarily provided upon their under sides with longitudinallyextending reinforcing flanges which depend from the plane of the body ofthe bar. Draft is most effectively obtained when the perforations occupya maximum area of the bar and are uniformly arranged. However in castingthe ordinary form of grate bar of this type it is found necessary to solocate and pro portion the reinforcing flanges that the number of draftperforations in the bar must be greatly reduced, For example in theintermediate portion of such a bar the draft perforations are arrangedin longitudinally extending rows located relatively close to oneanother, and the perforated area cannot be extended over the entiresurface of the bar for the reason that the space between adjacent rowsis not sufficient to ac commodate a reinforcing flange of the properdimensions. As a consequence the bar is left imperforate alonglongitudinal portions where the reinforcing flanges are located andwhere other rows of perforations would otherwise be provided inobtaining a symmetrical arrangement of such perforations.

In consideration of the foregoing it is the primary object of thepresent invention to provide a grate bar in which the reinforcingflanges are so formed as to permit of the bar being rovided throughoutsubstantially its entire area with draft perforations symmetricallyarranged and without any of the perforations being obstructed by thesaid flanges.

Another object of the invention is to so form the flanges that they willmore readily compensate for expansion and contraction of the bar andmoreefi'ectually reinforce the same although capable of being formedsomewhat thinner than is considered practicable in the case of straightlongitudinal flanges.

In the accompanying drawing:

Figure l is a plan View partly in horizontal section and partly brokenaway illustrating the grate bar embodying the invention;

Figure 2 is a side elevation of the bar.

in the drawing the body of the bar is indicated by the numeral 1 andthesaid body is formed with a plurality of draft openings indicated by thenumeral 2. These openings are i referably arranged in longitudinalseries located relatively close to one another, and the openings inadjacent series are preferably relatively staggered so that the openingsmay be formed of maximum diameter and of such number as to distributethem over a maximum portion of the area of the bar. Also the bar 1 isformed in its longitudinal edges with notches 3 which register inadjacent bars when the bars are disposed edge to edge and thus provideadditional draft openings and maintain the symmetrical arrangementthereof. At each end the bar 1 is formed upon its underside withdepending lugs 4c and with longitudinally extending reinforcing flanges5. The flanges 5 extend between the lugs l longitudinally of theunderside of the bar and depend from the plane thereof and by ref erenceto the drawings it will be observed that each flange is given asinusoidal form and is so arranged that because of this form and thestaggered arrangement of the draft perforations, the perforations ofadjacent rows will be accommodated within the con volutions of theflanges. Therefore the presence of the reinforcing flanges does not inany way obstruct the passage of air through the perforations and the barmay be uniformly perforated throughout its entire area. Furthermore itis obvious that a reinforcing flange given the form stated will possessgreater strength than a straight flange even though formed thinner, andalso it is better adapted to compensate for expansion and contraction ofthe body of the bar.

In order to relatively brace the reinforcing flanges 5, one or moretransverse reinforcing flanges 6 are formed upon the underside of thebody of the bar and extend between and are integrally connected with theflanges 5 as best shown in Figure 1, and

a this/flange 6 is also preferably of sinusoidal form so as to adapt itto clear the draft openings in its vicinity.

From the foregoing description of the invention it Will be evident thatby reason of the peculiar form given the reinforcing flanges and byreason of the location of these flanges, the body of the bar iseffectually reinforced. expansion andcontraction is compensated for, andpro ision is made for the formation of a maximum number of draftperforations inthe said body of the bar and their even or symmetricaldisposi tion.

Having thus described the invention Whatthe under side of the body andpositioned and a transverse reinforcing flange connectingsaidlongitudinally running flanges, all of said flanges being ofsinusoidal formation.

2. A grate bar CODlPI'lSlng a body With a plain top surface and havingdraft perforations arranged in rows extending longitudinally with thebar, the perforations in adjacent rows being relatively staggered,supporting lugs at the ends of said body, spaced solid reinforcingflanges integral with and depending from the under side of the body andextending between said supporting lugs, said flangeseach positionedalong one of the outermost rows of perforations, the convolutions of theflanges corresponding to the contour of the adjacent perforations, and atransverse flange connecting said other flanges, all of said flangesbeing of sinusoidal form.

In testimony whereof I affix my signature ARTHURJOSEPH NAQUIN. [1,. S

